Question 1

Which of the following reagents will selectively oxidize an aldose to an aldonic acid?

Accepted Answer

A) PCC 
B) Ag2O in NH4OH 
C) FeCl3 
D) HNO3 
A) PCC 
B) Ag2O in NH4OH 
C) FeCl3 
D) HNO3 B

Question 2

Which of the following compounds is not a valid representation for D-glucose?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
E) E 
A) A 
B) B 
C) C 
D) D 
E) E E

Question 3

From the disaccharides listed below, which one will not undergo mutarotation?

Accepted Answer

A) Sucrose 
B) Maltose 
C) Lactose 
D) Xylobiose 
A) Sucrose 
B) Maltose 
C) Lactose 
D) Xylobiose A

Question 4

What is the classification of pyranose forms of monosaccharides?

Accepted Answer

A) 5-Membered cyclic hemiacetals 
B) 6-Membered cyclic acetals 
C) 5-Membered cyclic acetals 
D) 6-Membered cyclic hemiacetals 
A) 5-Membered cyclic hemiacetals 
B) 6-Membered cyclic acetals 
C) 5-Membered cyclic acetals 
D) 6-Membered cyclic hemiacetals

Question 5

What is the Fischer projection of the monosaccharide from which the following glycoside was prepared?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
A) I 
B) II 
C) III 
D) IV

Question 6

Which is the correct Haworth projection for the banomer of D-glucose?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 7

The branching units in amylopectin, a polysaccharide, which enable this molecule to be water soluble are connected with __________________________ linkages.

Accepted Answer

A) b-1,4'-glycosidic 
B) a-1,4'-glycosidic 
C) a-1,6'-glycosidic 
D) b-1,6'-glycosidic 
A) b-1,4'-glycosidic 
B) a-1,4'-glycosidic 
C) a-1,6'-glycosidic 
D) b-1,6'-glycosidic

Question 8

From the sugars shown below, which one will not give a positive test with Tollens reagent?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 9

What is the best description of the product formed in the following reaction sequence?

Accepted Answer

A) The product is an optically active aldonic acid. 
B) The product is an optically inactive aldonic acid. 
C) The product is an optically active aldaric acid. 
D) The product is an optically inactive aldaric acid. 
A) The product is an optically active aldonic acid. 
B) The product is an optically inactive aldonic acid. 
C) The product is an optically active aldaric acid. 
D) The product is an optically inactive aldaric acid.

Question 10

Which of the following compounds is a b anomer?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 11

Which sugar is represented by the line angle structure below?

Accepted Answer

A) D-fructose 
B) D-sorbose 
C) L-psicose 
D) L-tagatose 
A) D-fructose 
B) D-sorbose 
C) L-psicose 
D) L-tagatose

Question 12

Which of the following reagents would convert glucose into ethyl glucopyranoside?

Accepted Answer

A) EtBr, aq.HCl 
B) EtOH, aq.HCl 
C) EtOH, NaOH 
D) Ag2O in NH4OH 
A) EtBr, aq.HCl 
B) EtOH, aq.HCl 
C) EtOH, NaOH 
D) Ag2O in NH4OH

Question 13

Which is the correct Fischer projection for the open-chain form of the carbohydrate shown below?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 14

Which of the following best describes the relationship between D-glucose and D-fructose?

Accepted Answer

A) Enantiomers 
B) Epimers 
C) Anomers 
D) Constitutional isomers 
A) Enantiomers 
B) Epimers 
C) Anomers 
D) Constitutional isomers

Question 15

Which of the following sugars can be classified as a ketopentose?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 16

Which of the following compounds is an aldose?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 17

Which of the following is a reducing sugar?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 18

Cellulose is a polysaccharide with ________________________ linkages.

Accepted Answer

A) b-1,4'-glycosidic 
B) a-1,4'-glycosidic 
C) b-1,6'-glycosidic 
D) a-1,6'-glycosidic 
A) b-1,4'-glycosidic 
B) a-1,4'-glycosidic 
C) b-1,6'-glycosidic 
D) a-1,6'-glycosidic

Question 19

Amylose is a polysaccharide with ________________________ linkages.

Accepted Answer

A) b-1,4'-glycosidic 
B) a-1,4'-glycosidic 
C) b-1,6'-glycosidic 
D) a-1,6'-glycosidic 
A) b-1,4'-glycosidic 
B) a-1,4'-glycosidic 
C) b-1,6'-glycosidic 
D) a-1,6'-glycosidic

Question 20

What is the process called for the interconversion of one anomer to the other?

Accepted Answer

A) Racemization 
B) Mutarotation 
C) Epimerization 
D) Enolization 
A) Racemization 
B) Mutarotation 
C) Epimerization 
D) Enolization

Exam 28: Carbohydrates

Which of the following reagents will selectively oxidize an aldose to an aldonic acid?

Which of the following compounds is not a valid representation for D-glucose?

From the disaccharides listed below, which one will not undergo mutarotation?

What is the classification of pyranose forms of monosaccharides?

What is the Fischer projection of the monosaccharide from which the following glycoside was prepared?

Which is the correct Haworth projection for the banomer of D-glucose?

The branching units in amylopectin, a polysaccharide, which enable this molecule to be water soluble are connected with __________________________ linkages.

From the sugars shown below, which one will not give a positive test with Tollens reagent?

What is the best description of the product formed in the following reaction sequence?

Which of the following compounds is a b anomer?

Which sugar is represented by the line angle structure below?

Which of the following reagents would convert glucose into ethyl glucopyranoside?

Which is the correct Fischer projection for the open-chain form of the carbohydrate shown below?

Which of the following best describes the relationship between D-glucose and D-fructose?

Which of the following sugars can be classified as a ketopentose?

Which of the following compounds is an aldose?

Which of the following is a reducing sugar?

Cellulose is a polysaccharide with ________________________ linkages.

Amylose is a polysaccharide with ________________________ linkages.

What is the process called for the interconversion of one anomer to the other?

Structure and Bonding

Acids and Bases

Introduction to Organic Molecules and Functional Groups

Alkanes

Stereochemistry

Understanding Organic Reactions

Alkyl Halides and Nucleophilic Substitution

Alkyl Halides and Elimination Reactions

Alcohols, Ethers, and Related Compounds

Alkenes

Alkynes

Oxidation and Reduction

Mass Spectrometry and Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Radical Reactions

Conjugation, Resonance, and Dienes

Benzene and Aromatic Compounds

Reactions of Aromatic Compounds

Carboxylic Acids and the Acidity of the O-H Bond

Introduction to Carbonyl Chemistry;

Aldehydes and Ketones Nucleophilic Addition

Carboxylic Acids and Derivatives

Substitution Reactions of Carbonyl Compounds at the Alpha-Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond Forming Reactions in Organic Synthesis

Pericyclic Reactions

Amino Acids and Proteins

Synthetic Polymers

Lipids

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